Final answer:
An Approved Maintenance Organization (AMO) certificate can be issued with ratings in categories such as aircraft, avionics, instrument, engine, propeller, structure, component, welding, and NDT.
Step-by-step explanation:
An Approved Maintenance Organization (AMO) certificate can be issued with ratings in the following categories:
- Aircraft
- Avionics
- Instrument
- Engine
- Propeller
- Structure
- Component
- Welding
- NDT (Non-Destructive Testing)
These categories encompass various aspects of aircraft maintenance, including different systems, components, and operations.